We read 21 results from Risco Pws’s 2025 water quality report. No results over a legal limit; 5 above a health goal or guideline.
Serves about 278 people · Water system ID MO4010689 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Chloridehighest measured · range 354 to 354 · sampled 2024 · 2025 report, page 3 | 354 ppm | — | 250 ppm guideline | Above the guideline1.4x the guideline (taste, odor or stains; not a health limit) |
| Ironhighest measured · range 0.63 to 0.63 · sampled 2024 · 2025 report, page 3 | 0.63 ppm | — | 0.3 ppm guideline | Above the guideline2.1x the guideline (taste, odor or stains; not a health limit) |
| Radium (combined 226 + 228)highest measured · range 1.9 to 1.9 · sampled 2023 · 2025 report, page 2 | 1.9 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-228highest measured · range 1.9 to 1.9 · sampled 2023 · 2025 report, page 2 | 1.9 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal100x the health goal |
| Total dissolved solidshighest measured · range 774 to 774 · sampled 2024 · 2025 report, page 3 | 774 ppm | — | 500 ppm guideline | Above the guideline1.5x the guideline (taste, odor or stains; not a health limit) |
| Aluminumhighest measured · range 0.02 to 0.02 · sampled 2024 · 2025 report, page 3 | 0.02 ppm | — | 0.2 ppm guideline | Within the guideline |
| Bariumhighest measured · range 0.07 to 0.07 · sampled 2024 · 2025 report, page 2 | 0.07 ppm | 2 ppm | 2 ppm | Below the health goal |
| Copper90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | 0.01 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Fluoridehighest measured · range 0.26 to 0.26 · sampled 2024 · 2025 report, page 2 | 0.26 ppm | 1 ppm | 4 ppm | Below the health goal |
| Lead90th percentile of homes tested, 0 over the action level · sampled 2024 · Customer taps · 2025 report, page 2 | Not detected | 0.2 ppb | 15 ppb (action level) | Not detected |
| Manganesehighest measured · range 0.03 to 0.03 · sampled 2024 · 2025 report, page 3 | 0.03 ppm | — | 0.05 ppm guideline | Within the guideline |
| Nitrate (as N)highest measured · range 0.02 to 0.02 · 2025 report, page 2 | 0.02 ppm | 10 ppm | 10 ppm | Below the health goal |
| pHhighest measured · range 7.54 to 7.54 · sampled 2024 · 2025 report, page 3 | 7.54 | — | — | Normal range |
| Sulfatehighest measured · range 53.4 to 53.4 · sampled 2024 · 2025 report, page 3 | 53.4 ppm | — | 250 ppm guideline | Within the guideline |
| Zinchighest measured · range 0.0062 to 0.0062 · sampled 2024 · 2025 report, page 3 | 0.0062 ppm | — | 5 ppm guideline | Within the guideline |
| Alkalinityhighest measured · range 171 to 171 · sampled 2024 · 2025 report, page 3 | 171 ppm | None set | None | No health limit |
| Calciumhighest measured · range 38 to 38 · sampled 2024 · 2025 report, page 3 | 38 ppm | None set | None | No health limit |
| Hardnesshighest measured · range 7.49 to 7.49 · sampled 2024 · 2025 report, page 3 | 7.49 gpg (128 ppm) | — | — | Hard |
| Magnesiumhighest measured · range 8.11 to 8.11 · sampled 2024 · 2025 report, page 3 | 8.11 ppm | None set | None | No health limit |
| Potassiumhighest measured · range 6.17 to 6.17 · sampled 2024 · 2025 report, page 3 | 6.17 ppm | None set | None | No health limit |
| Sodiumhighest measured · range 232 to 232 · sampled 2024 · 2025 report, page 3 | 232 ppm | None set | None | No health limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Salty taste / high TDS
Found: Chloride, Total dissolved solids
What removes it: Reverse osmosis.
Radium and uranium
Found: Radium (combined 226 + 228), Radium-228
What removes it: Reverse osmosis.
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